./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/neural-networks/cartpole_10_safe.c-amalgamation.i --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/neural-networks/cartpole_10_safe.c-amalgamation.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 511061b66b00ef6f9b304d05bfc452d60ed274dcc4cfea74ab59e23c1aa7aee6 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 22:00:24,822 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 22:00:24,893 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 22:00:24,897 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 22:00:24,898 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 22:00:24,924 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 22:00:24,925 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 22:00:24,926 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 22:00:24,926 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 22:00:24,930 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 22:00:24,930 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 22:00:24,930 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 22:00:24,932 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 22:00:24,933 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 22:00:24,933 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 22:00:24,933 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 22:00:24,933 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 22:00:24,934 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 22:00:24,934 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 22:00:24,934 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 22:00:24,934 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 22:00:24,935 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 22:00:24,935 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 22:00:24,935 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 22:00:24,935 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 22:00:24,935 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 22:00:24,935 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 22:00:24,936 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 22:00:24,936 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 22:00:24,936 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 22:00:24,937 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 22:00:24,937 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 22:00:24,938 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 22:00:24,938 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 22:00:24,938 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 22:00:24,938 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 22:00:24,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 22:00:24,938 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 22:00:24,939 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 22:00:24,939 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 22:00:24,939 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 22:00:24,939 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 22:00:24,939 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 511061b66b00ef6f9b304d05bfc452d60ed274dcc4cfea74ab59e23c1aa7aee6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 22:00:25,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 22:00:25,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 22:00:25,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 22:00:25,180 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 22:00:25,180 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 22:00:25,181 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/neural-networks/cartpole_10_safe.c-amalgamation.i [2023-11-22 22:00:26,277 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 22:00:26,605 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 22:00:26,607 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/neural-networks/cartpole_10_safe.c-amalgamation.i [2023-11-22 22:00:26,627 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ff11d177/be901816bb39400399e651683e16d3a9/FLAGb03828f5a [2023-11-22 22:00:26,642 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ff11d177/be901816bb39400399e651683e16d3a9 [2023-11-22 22:00:26,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 22:00:26,645 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 22:00:26,647 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 22:00:26,647 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 22:00:26,651 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 22:00:26,651 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:00:26" (1/1) ... [2023-11-22 22:00:26,652 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a9d131c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:26, skipping insertion in model container [2023-11-22 22:00:26,652 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:00:26" (1/1) ... [2023-11-22 22:00:26,720 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 22:00:26,908 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-22 22:00:27,272 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/neural-networks/cartpole_10_safe.c-amalgamation.i[63697,63710] [2023-11-22 22:00:27,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 22:00:27,548 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 22:00:27,576 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-22 22:00:27,593 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/neural-networks/cartpole_10_safe.c-amalgamation.i[63697,63710] [2023-11-22 22:00:27,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 22:00:27,877 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 22:00:27,883 INFO L206 MainTranslator]: Completed translation [2023-11-22 22:00:27,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:27 WrapperNode [2023-11-22 22:00:27,884 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 22:00:27,885 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 22:00:27,885 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 22:00:27,885 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 22:00:27,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:27" (1/1) ... [2023-11-22 22:00:28,004 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:27" (1/1) ... [2023-11-22 22:00:28,249 INFO L138 Inliner]: procedures = 621, calls = 4747, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 5015 [2023-11-22 22:00:28,250 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 22:00:28,250 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 22:00:28,251 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 22:00:28,251 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 22:00:28,260 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:27" (1/1) ... [2023-11-22 22:00:28,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:27" (1/1) ... [2023-11-22 22:00:28,326 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:27" (1/1) ... [2023-11-22 22:00:28,386 INFO L189 HeapSplitter]: Split 4721 memory accesses to 12 slices as follows [2, 7, 257, 65, 3, 4097, 65, 129, 3, 10, 70, 13] [2023-11-22 22:00:28,386 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:27" (1/1) ... [2023-11-22 22:00:28,386 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:27" (1/1) ... [2023-11-22 22:00:28,551 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:27" (1/1) ... [2023-11-22 22:00:28,566 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:27" (1/1) ... [2023-11-22 22:00:28,590 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:27" (1/1) ... [2023-11-22 22:00:28,604 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:27" (1/1) ... [2023-11-22 22:00:28,629 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 22:00:28,630 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 22:00:28,630 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 22:00:28,630 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 22:00:28,631 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:27" (1/1) ... [2023-11-22 22:00:28,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 22:00:28,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:28,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 22:00:28,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 22:00:28,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-22 22:00:28,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-22 22:00:28,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-22 22:00:28,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-22 22:00:28,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-22 22:00:28,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-22 22:00:28,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-22 22:00:28,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-22 22:00:28,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-22 22:00:28,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#9 [2023-11-22 22:00:28,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#10 [2023-11-22 22:00:28,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#11 [2023-11-22 22:00:28,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 22:00:28,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-22 22:00:28,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-22 22:00:28,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2023-11-22 22:00:28,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#3 [2023-11-22 22:00:28,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#4 [2023-11-22 22:00:28,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#5 [2023-11-22 22:00:28,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#6 [2023-11-22 22:00:28,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#7 [2023-11-22 22:00:28,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#8 [2023-11-22 22:00:28,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#9 [2023-11-22 22:00:28,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#10 [2023-11-22 22:00:28,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#11 [2023-11-22 22:00:28,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-22 22:00:28,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-22 22:00:28,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#2 [2023-11-22 22:00:28,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#3 [2023-11-22 22:00:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#4 [2023-11-22 22:00:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#5 [2023-11-22 22:00:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#6 [2023-11-22 22:00:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#7 [2023-11-22 22:00:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#8 [2023-11-22 22:00:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#9 [2023-11-22 22:00:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#10 [2023-11-22 22:00:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#11 [2023-11-22 22:00:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 22:00:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 22:00:28,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 22:00:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 22:00:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 22:00:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 22:00:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 22:00:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-22 22:00:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-22 22:00:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-22 22:00:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-22 22:00:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-22 22:00:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-22 22:00:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-22 22:00:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-22 22:00:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-22 22:00:28,945 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 22:00:28,946 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 22:00:33,659 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 22:00:33,836 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 22:00:33,836 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-22 22:00:33,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:00:33 BoogieIcfgContainer [2023-11-22 22:00:33,837 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 22:00:33,838 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 22:00:33,838 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 22:00:33,841 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 22:00:33,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 10:00:26" (1/3) ... [2023-11-22 22:00:33,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3ab8ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:00:33, skipping insertion in model container [2023-11-22 22:00:33,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:00:27" (2/3) ... [2023-11-22 22:00:33,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3ab8ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:00:33, skipping insertion in model container [2023-11-22 22:00:33,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:00:33" (3/3) ... [2023-11-22 22:00:33,843 INFO L112 eAbstractionObserver]: Analyzing ICFG cartpole_10_safe.c-amalgamation.i [2023-11-22 22:00:33,856 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 22:00:33,857 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 22:00:33,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 22:00:33,896 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3b5e9339, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 22:00:33,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 22:00:33,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-22 22:00:33,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:33,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:33,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:33,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:33,910 INFO L85 PathProgramCache]: Analyzing trace with hash -531373804, now seen corresponding path program 1 times [2023-11-22 22:00:33,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:33,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807141698] [2023-11-22 22:00:33,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:33,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:00:34,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:34,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807141698] [2023-11-22 22:00:34,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807141698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:00:34,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:00:34,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 22:00:34,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514039472] [2023-11-22 22:00:34,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:00:34,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 22:00:34,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 22:00:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 22:00:34,745 INFO L87 Difference]: Start difference. First operand has 46 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:34,935 INFO L93 Difference]: Finished difference Result 89 states and 155 transitions. [2023-11-22 22:00:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 22:00:34,937 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-22 22:00:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:34,942 INFO L225 Difference]: With dead ends: 89 [2023-11-22 22:00:34,942 INFO L226 Difference]: Without dead ends: 44 [2023-11-22 22:00:34,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 22:00:34,946 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:34,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:00:34,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-22 22:00:34,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-22 22:00:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 43 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:34,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-11-22 22:00:34,971 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 27 [2023-11-22 22:00:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:34,971 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-11-22 22:00:34,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-11-22 22:00:34,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-22 22:00:34,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:34,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:34,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 22:00:34,974 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:34,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:34,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1087110762, now seen corresponding path program 1 times [2023-11-22 22:00:34,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:34,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962532570] [2023-11-22 22:00:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:34,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:00:35,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:35,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962532570] [2023-11-22 22:00:35,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962532570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:00:35,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:00:35,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 22:00:35,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186308625] [2023-11-22 22:00:35,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:00:35,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 22:00:35,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:35,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 22:00:35,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 22:00:35,671 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:35,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:35,918 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2023-11-22 22:00:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 22:00:35,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-22 22:00:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:35,921 INFO L225 Difference]: With dead ends: 80 [2023-11-22 22:00:35,922 INFO L226 Difference]: Without dead ends: 44 [2023-11-22 22:00:35,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 22:00:35,924 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:35,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:00:35,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-22 22:00:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-22 22:00:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:35,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2023-11-22 22:00:35,935 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 27 [2023-11-22 22:00:35,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:35,935 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2023-11-22 22:00:35,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:35,935 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2023-11-22 22:00:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-22 22:00:35,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:35,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:35,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 22:00:35,938 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:35,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:35,939 INFO L85 PathProgramCache]: Analyzing trace with hash -269462312, now seen corresponding path program 1 times [2023-11-22 22:00:35,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:35,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206600327] [2023-11-22 22:00:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:35,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:00:36,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:36,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206600327] [2023-11-22 22:00:36,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206600327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:00:36,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 22:00:36,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 22:00:36,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762924632] [2023-11-22 22:00:36,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:00:36,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 22:00:36,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 22:00:36,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 22:00:36,779 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:36,986 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2023-11-22 22:00:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 22:00:36,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-22 22:00:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:36,987 INFO L225 Difference]: With dead ends: 75 [2023-11-22 22:00:36,987 INFO L226 Difference]: Without dead ends: 45 [2023-11-22 22:00:36,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 22:00:36,988 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:36,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:00:36,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-22 22:00:36,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-22 22:00:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2023-11-22 22:00:36,993 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 27 [2023-11-22 22:00:36,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:36,993 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2023-11-22 22:00:36,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2023-11-22 22:00:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-22 22:00:36,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:36,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:36,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 22:00:36,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:36,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:36,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1144208086, now seen corresponding path program 1 times [2023-11-22 22:00:36,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:36,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865649811] [2023-11-22 22:00:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:36,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:00:37,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:37,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865649811] [2023-11-22 22:00:37,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865649811] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:37,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265578919] [2023-11-22 22:00:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:37,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:37,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:37,777 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:00:37,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 22:00:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:38,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 5408 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 22:00:38,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 22:00:38,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:00:38,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265578919] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:38,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:00:38,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-22 22:00:38,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323481615] [2023-11-22 22:00:38,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:00:38,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 22:00:38,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:38,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 22:00:38,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 22:00:38,900 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:39,093 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-11-22 22:00:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 22:00:39,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-22 22:00:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:39,094 INFO L225 Difference]: With dead ends: 66 [2023-11-22 22:00:39,094 INFO L226 Difference]: Without dead ends: 46 [2023-11-22 22:00:39,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 22:00:39,095 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:39,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:00:39,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-22 22:00:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-22 22:00:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2023-11-22 22:00:39,098 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 28 [2023-11-22 22:00:39,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:39,098 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2023-11-22 22:00:39,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:39,098 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2023-11-22 22:00:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-22 22:00:39,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:39,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:39,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 22:00:39,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:39,316 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:39,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash -372313272, now seen corresponding path program 1 times [2023-11-22 22:00:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:39,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063898739] [2023-11-22 22:00:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:39,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:00:39,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:39,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063898739] [2023-11-22 22:00:39,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063898739] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:39,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648765076] [2023-11-22 22:00:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:39,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:39,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:39,927 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:00:39,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 22:00:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:40,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 5426 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 22:00:40,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 22:00:40,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:00:40,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648765076] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:40,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:00:40,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-22 22:00:40,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587188530] [2023-11-22 22:00:40,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:00:40,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 22:00:40,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:40,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 22:00:40,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 22:00:40,942 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:41,110 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2023-11-22 22:00:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 22:00:41,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-22 22:00:41,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:41,110 INFO L225 Difference]: With dead ends: 57 [2023-11-22 22:00:41,110 INFO L226 Difference]: Without dead ends: 47 [2023-11-22 22:00:41,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 22:00:41,111 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:41,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:00:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-22 22:00:41,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-22 22:00:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:41,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2023-11-22 22:00:41,114 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2023-11-22 22:00:41,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:41,114 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2023-11-22 22:00:41,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:41,114 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2023-11-22 22:00:41,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-22 22:00:41,115 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:41,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:41,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 22:00:41,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:41,323 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:41,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:41,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2044304526, now seen corresponding path program 1 times [2023-11-22 22:00:41,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:41,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048700650] [2023-11-22 22:00:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:41,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:00:41,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:41,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048700650] [2023-11-22 22:00:41,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048700650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:41,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433104888] [2023-11-22 22:00:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:41,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:41,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:41,959 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:00:41,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 22:00:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:42,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 5444 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-22 22:00:42,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 22:00:42,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:00:42,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433104888] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:42,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:00:42,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-22 22:00:42,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748303174] [2023-11-22 22:00:42,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:00:42,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 22:00:42,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:42,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 22:00:42,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 22:00:42,923 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:43,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:43,103 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2023-11-22 22:00:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 22:00:43,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-22 22:00:43,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:43,104 INFO L225 Difference]: With dead ends: 74 [2023-11-22 22:00:43,104 INFO L226 Difference]: Without dead ends: 48 [2023-11-22 22:00:43,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 22:00:43,105 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:43,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:00:43,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-22 22:00:43,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-22 22:00:43,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:43,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2023-11-22 22:00:43,108 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 34 [2023-11-22 22:00:43,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:43,108 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2023-11-22 22:00:43,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:43,108 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2023-11-22 22:00:43,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-22 22:00:43,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:43,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:43,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 22:00:43,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:43,313 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:43,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:43,313 INFO L85 PathProgramCache]: Analyzing trace with hash -359810836, now seen corresponding path program 1 times [2023-11-22 22:00:43,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:43,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730740022] [2023-11-22 22:00:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:43,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:00:44,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:44,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730740022] [2023-11-22 22:00:44,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730740022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:44,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230590163] [2023-11-22 22:00:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:44,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:44,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:44,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:00:44,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 22:00:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:45,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 5450 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 22:00:45,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 22:00:45,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:00:45,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230590163] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:45,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:00:45,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-22 22:00:45,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769092183] [2023-11-22 22:00:45,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:00:45,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 22:00:45,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:45,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 22:00:45,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:00:45,058 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:45,254 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2023-11-22 22:00:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 22:00:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-22 22:00:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:45,255 INFO L225 Difference]: With dead ends: 64 [2023-11-22 22:00:45,255 INFO L226 Difference]: Without dead ends: 49 [2023-11-22 22:00:45,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:00:45,256 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:45,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:00:45,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-22 22:00:45,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-22 22:00:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2023-11-22 22:00:45,260 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 37 [2023-11-22 22:00:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:45,260 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2023-11-22 22:00:45,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2023-11-22 22:00:45,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-22 22:00:45,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:45,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:45,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 22:00:45,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:45,470 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:45,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:45,471 INFO L85 PathProgramCache]: Analyzing trace with hash 242160194, now seen corresponding path program 1 times [2023-11-22 22:00:45,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:45,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420273559] [2023-11-22 22:00:45,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:45,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:00:46,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:46,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420273559] [2023-11-22 22:00:46,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420273559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:46,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993459925] [2023-11-22 22:00:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:46,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:46,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:46,200 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:00:46,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 22:00:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:47,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 5456 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 22:00:47,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:00:47,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 22:00:47,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993459925] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:47,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:00:47,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-22 22:00:47,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441948541] [2023-11-22 22:00:47,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:00:47,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 22:00:47,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:47,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 22:00:47,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:00:47,207 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:47,385 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-11-22 22:00:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 22:00:47,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-22 22:00:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:47,386 INFO L225 Difference]: With dead ends: 54 [2023-11-22 22:00:47,386 INFO L226 Difference]: Without dead ends: 50 [2023-11-22 22:00:47,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-22 22:00:47,387 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:47,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:00:47,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-22 22:00:47,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-22 22:00:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:47,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2023-11-22 22:00:47,390 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 40 [2023-11-22 22:00:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:47,390 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2023-11-22 22:00:47,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2023-11-22 22:00:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-22 22:00:47,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:47,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:47,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 22:00:47,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:47,600 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:47,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:47,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1371144433, now seen corresponding path program 1 times [2023-11-22 22:00:47,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:47,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064550375] [2023-11-22 22:00:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:47,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 22:00:48,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:48,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064550375] [2023-11-22 22:00:48,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064550375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:48,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108483446] [2023-11-22 22:00:48,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:48,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:48,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:48,375 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:00:48,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 22:00:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:49,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 5462 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-22 22:00:49,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 22:00:49,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 22:00:49,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108483446] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:00:49,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:00:49,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-11-22 22:00:49,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504533102] [2023-11-22 22:00:49,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:00:49,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 22:00:49,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:49,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 22:00:49,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:00:49,349 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:49,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:49,667 INFO L93 Difference]: Finished difference Result 95 states and 130 transitions. [2023-11-22 22:00:49,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 22:00:49,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-22 22:00:49,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:49,669 INFO L225 Difference]: With dead ends: 95 [2023-11-22 22:00:49,669 INFO L226 Difference]: Without dead ends: 60 [2023-11-22 22:00:49,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-22 22:00:49,670 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:49,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 230 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 22:00:49,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-22 22:00:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-22 22:00:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 59 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2023-11-22 22:00:49,674 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 43 [2023-11-22 22:00:49,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:49,674 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2023-11-22 22:00:49,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:49,674 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2023-11-22 22:00:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-22 22:00:49,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:49,675 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:49,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 22:00:49,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:49,881 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:49,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash 528894503, now seen corresponding path program 2 times [2023-11-22 22:00:49,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:49,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130982040] [2023-11-22 22:00:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:49,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-22 22:00:50,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:50,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130982040] [2023-11-22 22:00:50,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130982040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:50,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243037682] [2023-11-22 22:00:50,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:00:50,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:50,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:50,587 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:00:50,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 22:00:51,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:00:51,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:00:51,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 5527 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 22:00:51,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-22 22:00:51,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 22:00:51,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243037682] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:51,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:00:51,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-11-22 22:00:51,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227821319] [2023-11-22 22:00:51,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:00:51,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 22:00:51,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:51,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 22:00:51,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:00:51,625 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:51,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:51,805 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2023-11-22 22:00:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 22:00:51,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-22 22:00:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:51,806 INFO L225 Difference]: With dead ends: 70 [2023-11-22 22:00:51,806 INFO L226 Difference]: Without dead ends: 61 [2023-11-22 22:00:51,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-22 22:00:51,807 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:51,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:00:51,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-22 22:00:51,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-22 22:00:51,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 60 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2023-11-22 22:00:51,810 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 53 [2023-11-22 22:00:51,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:51,811 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2023-11-22 22:00:51,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2023-11-22 22:00:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-22 22:00:51,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:51,812 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:51,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 22:00:52,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:52,013 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:52,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:52,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1861807109, now seen corresponding path program 1 times [2023-11-22 22:00:52,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:52,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123680730] [2023-11-22 22:00:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:52,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-22 22:00:52,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:52,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123680730] [2023-11-22 22:00:52,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123680730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:52,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024234385] [2023-11-22 22:00:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:52,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:52,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:52,653 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:00:52,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 22:00:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:53,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 5541 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 22:00:53,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-22 22:00:53,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-22 22:00:53,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024234385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:00:53,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:00:53,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 9 [2023-11-22 22:00:53,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389371444] [2023-11-22 22:00:53,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:00:53,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 22:00:53,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:53,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 22:00:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-22 22:00:53,697 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:54,049 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2023-11-22 22:00:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 22:00:54,049 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-22 22:00:54,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:54,050 INFO L225 Difference]: With dead ends: 116 [2023-11-22 22:00:54,050 INFO L226 Difference]: Without dead ends: 71 [2023-11-22 22:00:54,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-22 22:00:54,050 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:54,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 267 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 22:00:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-22 22:00:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-22 22:00:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2023-11-22 22:00:54,055 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 56 [2023-11-22 22:00:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:54,055 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2023-11-22 22:00:54,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2023-11-22 22:00:54,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-22 22:00:54,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:54,060 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:54,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-22 22:00:54,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-22 22:00:54,265 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:54,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:54,265 INFO L85 PathProgramCache]: Analyzing trace with hash -78359747, now seen corresponding path program 2 times [2023-11-22 22:00:54,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:54,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154526873] [2023-11-22 22:00:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:54,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-22 22:00:55,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:55,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154526873] [2023-11-22 22:00:55,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154526873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:55,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438693566] [2023-11-22 22:00:55,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:00:55,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:55,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:55,049 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:00:55,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 22:00:56,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:00:56,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:00:56,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 5606 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-22 22:00:56,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-22 22:00:56,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:00:56,275 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-22 22:00:56,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438693566] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:00:56,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:00:56,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 6] total 19 [2023-11-22 22:00:56,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421926225] [2023-11-22 22:00:56,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:00:56,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 22:00:56,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:56,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 22:00:56,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-11-22 22:00:56,276 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 19 states, 19 states have (on average 5.842105263157895) internal successors, (111), 19 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:56,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:56,858 INFO L93 Difference]: Finished difference Result 139 states and 188 transitions. [2023-11-22 22:00:56,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-22 22:00:56,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.842105263157895) internal successors, (111), 19 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-22 22:00:56,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:56,859 INFO L225 Difference]: With dead ends: 139 [2023-11-22 22:00:56,859 INFO L226 Difference]: Without dead ends: 85 [2023-11-22 22:00:56,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2023-11-22 22:00:56,860 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 150 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:56,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 274 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 22:00:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-22 22:00:56,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2023-11-22 22:00:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3375) internal successors, (107), 80 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2023-11-22 22:00:56,864 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 66 [2023-11-22 22:00:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:56,865 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2023-11-22 22:00:56,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.842105263157895) internal successors, (111), 19 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2023-11-22 22:00:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-22 22:00:56,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:56,865 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:56,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 22:00:57,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:57,066 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:57,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:57,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1529729791, now seen corresponding path program 3 times [2023-11-22 22:00:57,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:57,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847159620] [2023-11-22 22:00:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:57,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:00:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-22 22:00:57,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:00:57,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847159620] [2023-11-22 22:00:57,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847159620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:00:57,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568043488] [2023-11-22 22:00:57,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:00:57,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:00:57,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:00:57,951 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:00:57,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 22:00:58,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-22 22:00:58,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:00:59,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 5473 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 22:00:59,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:00:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-22 22:00:59,041 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 22:00:59,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568043488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:00:59,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:00:59,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-22 22:00:59,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858281925] [2023-11-22 22:00:59,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:00:59,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 22:00:59,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:00:59,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 22:00:59,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-22 22:00:59,043 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:59,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:00:59,292 INFO L93 Difference]: Finished difference Result 124 states and 166 transitions. [2023-11-22 22:00:59,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 22:00:59,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-22 22:00:59,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:00:59,294 INFO L225 Difference]: With dead ends: 124 [2023-11-22 22:00:59,294 INFO L226 Difference]: Without dead ends: 84 [2023-11-22 22:00:59,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-22 22:00:59,297 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:00:59,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 113 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:00:59,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-22 22:00:59,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2023-11-22 22:00:59,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.3333333333333333) internal successors, (108), 81 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2023-11-22 22:00:59,307 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 70 [2023-11-22 22:00:59,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:00:59,308 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2023-11-22 22:00:59,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:00:59,309 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2023-11-22 22:00:59,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-22 22:00:59,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:00:59,312 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:00:59,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 22:00:59,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-22 22:00:59,524 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:00:59,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:00:59,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1554558736, now seen corresponding path program 1 times [2023-11-22 22:00:59,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:00:59,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042583693] [2023-11-22 22:00:59,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:00:59,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:00:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-22 22:01:00,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:00,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042583693] [2023-11-22 22:01:00,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042583693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:00,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624858725] [2023-11-22 22:01:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:00,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:00,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:00,269 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:01:00,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 22:01:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:01,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 5645 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 22:01:01,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:01:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-22 22:01:01,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 22:01:01,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624858725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 22:01:01,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 22:01:01,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-22 22:01:01,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327380157] [2023-11-22 22:01:01,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:01:01,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 22:01:01,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:01:01,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 22:01:01,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-22 22:01:01,229 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:01,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:01:01,396 INFO L93 Difference]: Finished difference Result 147 states and 197 transitions. [2023-11-22 22:01:01,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 22:01:01,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-11-22 22:01:01,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:01:01,397 INFO L225 Difference]: With dead ends: 147 [2023-11-22 22:01:01,397 INFO L226 Difference]: Without dead ends: 85 [2023-11-22 22:01:01,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-22 22:01:01,397 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:01:01,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:01:01,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-22 22:01:01,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2023-11-22 22:01:01,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.329268292682927) internal successors, (109), 82 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2023-11-22 22:01:01,405 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 73 [2023-11-22 22:01:01,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:01:01,405 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2023-11-22 22:01:01,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2023-11-22 22:01:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-22 22:01:01,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:01:01,406 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:01:01,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-22 22:01:01,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-22 22:01:01,606 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:01:01,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:01:01,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1120259536, now seen corresponding path program 1 times [2023-11-22 22:01:01,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:01:01,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860161472] [2023-11-22 22:01:01,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:01,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:01:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-22 22:01:02,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:02,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860161472] [2023-11-22 22:01:02,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860161472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:02,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576493573] [2023-11-22 22:01:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:02,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:02,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:02,382 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:01:02,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 22:01:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:03,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 5659 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 22:01:03,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:01:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-22 22:01:03,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:01:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-22 22:01:03,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576493573] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:03,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:01:03,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6] total 13 [2023-11-22 22:01:03,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615465565] [2023-11-22 22:01:03,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:01:03,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 22:01:03,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:01:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 22:01:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-22 22:01:03,405 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:03,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:01:03,590 INFO L93 Difference]: Finished difference Result 125 states and 166 transitions. [2023-11-22 22:01:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 22:01:03,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-11-22 22:01:03,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:01:03,591 INFO L225 Difference]: With dead ends: 125 [2023-11-22 22:01:03,591 INFO L226 Difference]: Without dead ends: 84 [2023-11-22 22:01:03,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-22 22:01:03,592 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:01:03,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 79 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:01:03,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-22 22:01:03,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-22 22:01:03,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.3253012048192772) internal successors, (110), 83 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:03,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2023-11-22 22:01:03,597 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 76 [2023-11-22 22:01:03,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:01:03,597 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2023-11-22 22:01:03,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2023-11-22 22:01:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-22 22:01:03,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:01:03,598 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:01:03,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 22:01:03,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-22 22:01:03,808 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:01:03,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:01:03,809 INFO L85 PathProgramCache]: Analyzing trace with hash -604552515, now seen corresponding path program 1 times [2023-11-22 22:01:03,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:01:03,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898348969] [2023-11-22 22:01:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:03,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:01:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-22 22:01:04,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:04,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898348969] [2023-11-22 22:01:04,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898348969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:04,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413812299] [2023-11-22 22:01:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:04,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:04,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:04,651 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:01:04,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 22:01:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:05,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 5664 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 22:01:05,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:01:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-22 22:01:05,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:01:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-22 22:01:05,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413812299] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:05,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:01:05,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6] total 13 [2023-11-22 22:01:05,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856617413] [2023-11-22 22:01:05,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:01:05,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 22:01:05,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:01:05,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 22:01:05,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-22 22:01:05,787 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:05,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:01:05,997 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2023-11-22 22:01:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 22:01:05,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2023-11-22 22:01:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:01:05,998 INFO L225 Difference]: With dead ends: 107 [2023-11-22 22:01:05,999 INFO L226 Difference]: Without dead ends: 88 [2023-11-22 22:01:05,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-22 22:01:05,999 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:01:05,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 115 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:01:06,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-22 22:01:06,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-22 22:01:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 87 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 114 transitions. [2023-11-22 22:01:06,014 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 114 transitions. Word has length 77 [2023-11-22 22:01:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:01:06,015 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 114 transitions. [2023-11-22 22:01:06,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 114 transitions. [2023-11-22 22:01:06,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-22 22:01:06,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:01:06,016 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:01:06,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-22 22:01:06,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-22 22:01:06,217 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:01:06,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:01:06,217 INFO L85 PathProgramCache]: Analyzing trace with hash -550947933, now seen corresponding path program 1 times [2023-11-22 22:01:06,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:01:06,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077231414] [2023-11-22 22:01:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:06,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:01:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-22 22:01:06,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:06,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077231414] [2023-11-22 22:01:06,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077231414] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:06,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901271544] [2023-11-22 22:01:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:06,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:06,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:06,987 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:01:06,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-22 22:01:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:07,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 5674 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-22 22:01:07,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:01:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-22 22:01:08,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:01:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-22 22:01:08,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901271544] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:08,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-22 22:01:08,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 9] total 16 [2023-11-22 22:01:08,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148557180] [2023-11-22 22:01:08,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 22:01:08,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 22:01:08,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:01:08,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 22:01:08,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-22 22:01:08,062 INFO L87 Difference]: Start difference. First operand 88 states and 114 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:08,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:01:08,256 INFO L93 Difference]: Finished difference Result 157 states and 206 transitions. [2023-11-22 22:01:08,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 22:01:08,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-11-22 22:01:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:01:08,257 INFO L225 Difference]: With dead ends: 157 [2023-11-22 22:01:08,257 INFO L226 Difference]: Without dead ends: 89 [2023-11-22 22:01:08,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-22 22:01:08,259 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 22:01:08,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 79 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 22:01:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-22 22:01:08,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-11-22 22:01:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.3068181818181819) internal successors, (115), 88 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:08,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 115 transitions. [2023-11-22 22:01:08,263 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 115 transitions. Word has length 79 [2023-11-22 22:01:08,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:01:08,263 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 115 transitions. [2023-11-22 22:01:08,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:08,264 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 115 transitions. [2023-11-22 22:01:08,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-22 22:01:08,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:01:08,264 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:01:08,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-22 22:01:08,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:08,465 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:01:08,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:01:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1880924804, now seen corresponding path program 1 times [2023-11-22 22:01:08,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:01:08,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135878169] [2023-11-22 22:01:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:08,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:01:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-22 22:01:09,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:09,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135878169] [2023-11-22 22:01:09,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135878169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:09,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935548338] [2023-11-22 22:01:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:09,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:09,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:09,287 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:01:09,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-22 22:01:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:10,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 5679 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 22:01:10,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:01:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-22 22:01:10,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:01:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-22 22:01:10,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935548338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:01:10,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:01:10,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-22 22:01:10,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054813785] [2023-11-22 22:01:10,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:01:10,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 22:01:10,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:01:10,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 22:01:10,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-22 22:01:10,451 INFO L87 Difference]: Start difference. First operand 89 states and 115 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:10,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:01:10,997 INFO L93 Difference]: Finished difference Result 177 states and 238 transitions. [2023-11-22 22:01:10,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-22 22:01:10,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2023-11-22 22:01:10,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:01:10,998 INFO L225 Difference]: With dead ends: 177 [2023-11-22 22:01:10,999 INFO L226 Difference]: Without dead ends: 108 [2023-11-22 22:01:10,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-11-22 22:01:11,000 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 45 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 22:01:11,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 469 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 22:01:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-22 22:01:11,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-11-22 22:01:11,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.308411214953271) internal successors, (140), 107 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2023-11-22 22:01:11,009 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 80 [2023-11-22 22:01:11,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:01:11,009 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2023-11-22 22:01:11,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2023-11-22 22:01:11,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-22 22:01:11,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:01:11,010 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:01:11,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-22 22:01:11,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-22 22:01:11,232 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:01:11,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:01:11,232 INFO L85 PathProgramCache]: Analyzing trace with hash 213343619, now seen corresponding path program 2 times [2023-11-22 22:01:11,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:01:11,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331529014] [2023-11-22 22:01:11,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:11,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:01:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 22:01:12,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:12,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331529014] [2023-11-22 22:01:12,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331529014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:12,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216825660] [2023-11-22 22:01:12,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 22:01:12,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:12,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:12,489 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:01:12,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-22 22:01:13,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 22:01:13,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:01:13,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 5792 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-22 22:01:13,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:01:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-11-22 22:01:13,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:01:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2023-11-22 22:01:13,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216825660] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:01:13,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:01:13,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 6] total 26 [2023-11-22 22:01:13,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913872935] [2023-11-22 22:01:13,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:01:13,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-22 22:01:13,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:01:13,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-22 22:01:13,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2023-11-22 22:01:13,788 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:01:14,619 INFO L93 Difference]: Finished difference Result 206 states and 272 transitions. [2023-11-22 22:01:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-22 22:01:14,620 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-11-22 22:01:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:01:14,620 INFO L225 Difference]: With dead ends: 206 [2023-11-22 22:01:14,620 INFO L226 Difference]: Without dead ends: 115 [2023-11-22 22:01:14,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2023-11-22 22:01:14,621 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 33 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-22 22:01:14,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 819 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-22 22:01:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-22 22:01:14,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2023-11-22 22:01:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.2946428571428572) internal successors, (145), 112 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:14,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 145 transitions. [2023-11-22 22:01:14,626 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 145 transitions. Word has length 99 [2023-11-22 22:01:14,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:01:14,626 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 145 transitions. [2023-11-22 22:01:14,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 145 transitions. [2023-11-22 22:01:14,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-22 22:01:14,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:01:14,627 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:01:14,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-22 22:01:14,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:14,839 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:01:14,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:01:14,839 INFO L85 PathProgramCache]: Analyzing trace with hash -774915223, now seen corresponding path program 3 times [2023-11-22 22:01:14,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:01:14,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810048479] [2023-11-22 22:01:14,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:14,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:01:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-22 22:01:16,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:16,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810048479] [2023-11-22 22:01:16,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810048479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:16,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610403905] [2023-11-22 22:01:16,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 22:01:16,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:16,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:16,198 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:01:16,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-22 22:01:17,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 22:01:17,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:01:17,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 5573 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 22:01:17,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:01:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-22 22:01:17,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:01:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-11-22 22:01:17,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610403905] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:01:17,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:01:17,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 5] total 22 [2023-11-22 22:01:17,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037433682] [2023-11-22 22:01:17,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:01:17,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-22 22:01:17,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:01:17,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-22 22:01:17,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-11-22 22:01:17,726 INFO L87 Difference]: Start difference. First operand 113 states and 145 transitions. Second operand has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:18,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:01:18,306 INFO L93 Difference]: Finished difference Result 178 states and 233 transitions. [2023-11-22 22:01:18,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-22 22:01:18,307 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-11-22 22:01:18,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:01:18,307 INFO L225 Difference]: With dead ends: 178 [2023-11-22 22:01:18,307 INFO L226 Difference]: Without dead ends: 130 [2023-11-22 22:01:18,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-11-22 22:01:18,308 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 62 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 22:01:18,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 462 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 22:01:18,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-22 22:01:18,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2023-11-22 22:01:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.2913385826771653) internal successors, (164), 127 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 164 transitions. [2023-11-22 22:01:18,315 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 164 transitions. Word has length 104 [2023-11-22 22:01:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:01:18,315 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 164 transitions. [2023-11-22 22:01:18,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 164 transitions. [2023-11-22 22:01:18,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-22 22:01:18,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:01:18,316 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:01:18,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-22 22:01:18,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:18,529 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:01:18,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:01:18,529 INFO L85 PathProgramCache]: Analyzing trace with hash -47110729, now seen corresponding path program 4 times [2023-11-22 22:01:18,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:01:18,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316516497] [2023-11-22 22:01:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:18,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:01:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-22 22:01:20,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:20,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316516497] [2023-11-22 22:01:20,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316516497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:20,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900714092] [2023-11-22 22:01:20,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 22:01:20,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:20,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:20,010 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:01:20,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-22 22:01:21,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 22:01:21,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 22:01:21,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 5895 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-22 22:01:21,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 22:01:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-11-22 22:01:21,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 22:01:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-11-22 22:01:21,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900714092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 22:01:21,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 22:01:21,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 7] total 25 [2023-11-22 22:01:21,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37400888] [2023-11-22 22:01:21,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 22:01:21,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-22 22:01:21,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 22:01:21,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-22 22:01:21,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-11-22 22:01:21,327 INFO L87 Difference]: Start difference. First operand 128 states and 164 transitions. Second operand has 25 states, 25 states have (on average 5.24) internal successors, (131), 25 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:22,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 22:01:22,021 INFO L93 Difference]: Finished difference Result 211 states and 279 transitions. [2023-11-22 22:01:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-22 22:01:22,021 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.24) internal successors, (131), 25 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2023-11-22 22:01:22,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 22:01:22,022 INFO L225 Difference]: With dead ends: 211 [2023-11-22 22:01:22,022 INFO L226 Difference]: Without dead ends: 151 [2023-11-22 22:01:22,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2023-11-22 22:01:22,023 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 73 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-22 22:01:22,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 524 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-22 22:01:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-22 22:01:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2023-11-22 22:01:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.2972972972972974) internal successors, (192), 148 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 192 transitions. [2023-11-22 22:01:22,030 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 192 transitions. Word has length 119 [2023-11-22 22:01:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 22:01:22,031 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 192 transitions. [2023-11-22 22:01:22,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.24) internal successors, (131), 25 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 22:01:22,031 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 192 transitions. [2023-11-22 22:01:22,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-22 22:01:22,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 22:01:22,032 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 10, 10, 10, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 22:01:22,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-22 22:01:22,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:22,252 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 22:01:22,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 22:01:22,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1655509955, now seen corresponding path program 5 times [2023-11-22 22:01:22,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 22:01:22,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818156650] [2023-11-22 22:01:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 22:01:22,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 22:01:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 22:01:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-11-22 22:01:23,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 22:01:23,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818156650] [2023-11-22 22:01:23,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818156650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 22:01:23,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163642125] [2023-11-22 22:01:23,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 22:01:23,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 22:01:23,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 22:01:23,646 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 22:01:23,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process Killed by 15